sync contacts and calendar with android

sync contacts and calendar with android

I am trying to set up my Android  (LG Nexus) with zoho using the corporate email option so that I can get contacts and calendar functionality. I have followed instructions to set this up but fails during setup. "Cannot connect to server error"

I have tried every setting from Domain\name to \name, enabled/disabled options and still nothing. 

So, I hope someone here can help, because if I can't get what would seem like basic integration in today's time working, then I will have to go back to google. 

I really like Zoho but without this it is.....a no go for me.